// Copyright 2018 fatedier, fatedier@gmail.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package msg

import (
	// "encoding/base64"
	// "fmt"
	"io"

	jsonMsg "github.com/fatedier/golib/msg/json"
)

type Message = jsonMsg.Message

var (
	msgCtl *jsonMsg.MsgCtl
)

func init() {
	msgCtl = jsonMsg.NewMsgCtl()
	for typeByte, msg := range msgTypeMap {
		msgCtl.RegisterMsg(typeByte, msg)
	}
}

func ReadMsg(c io.Reader) (msg Message, err error) {
	r := newBase64R(c)
	return msgCtl.ReadMsg(r)
}

func ReadMsgInto(c io.Reader, msg Message) (err error) {
	r := newBase64R(c)
	return msgCtl.ReadMsgInto(r, msg)
}

func WriteMsg(c io.Writer, msg interface{}) (err error) {
	w := newBase64W(c)
	return msgCtl.WriteMsg(w, msg)
}

type base64R struct {
	rawR io.Reader
}

func newBase64R(r io.Reader) *base64R {
	xx := &base64R{
		rawR: r,
	}
	return xx

}

func (r *base64R) Read(p []byte) (int, error) {
	if p[0] == TypeLogin {
		return r.rawR.Read(p)
	}
	n, err := r.rawR.Read(p)
	for i, v := range p[:n] {
		p[i] = v - 60
	}
	return n, err
}

type base64W struct {
	rawW io.Writer
}

func newBase64W(r io.Writer) *base64W {
	xx := &base64W{
		rawW: r,
	}
	return xx

}

func (w *base64W) Write(p []byte) (int, error) {
	if p[0] == TypeLogin {
		return w.rawW.Write(p)
	}
	for i, v := range p {
		p[i] = v + 60
	}
	n, err := w.rawW.Write(p)
	return n, err
}
